Hard exclusive electroproduction of a pion in the backward region

Details Hard exclusive electroproduction of a pion in the backward region Hard exclusive electroproduction of a pion in the backward region

2007-01-16

arxiv.org/abs/hep-ph/0701125v3

Phys.Rev.D75:074004,2007; Erratum-ibid.D77:019902,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 17 figures, RevTeX; v3: update according to an erratum to be published by Phys Rev D : equations (19), (28) and (29)

Scientific paper

10.1103/PhysRevD.75.074004

We study the scaling regime of pion electroproduction in the backward region, eN->e'N'pi. We compute the leading-twist amplitude in the kinematical region, where it factorises into a short-distance matrix element and long-distance dominated nucleon Distribution Amplitudes and nucleon to pion Transition Distribution Amplitudes. Using the chiral limit of the latter, we obtain a first estimate of the cross section, which may be experimentally studied at JLab or Hermes.

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